quadratus lumborum

Question 1

quadratus lumborum shape

Answer 1

flat

Question 2

quadratus lumborum origin

Answer 2

iliolumbar ligament & adjacent posterior iliac crest

Question 3

quadratus lumborum insertion

Answer 3

medial 1/2 of 12th rib, and transverse processes of L1-L4

Question 4

quadratus lumborum direction of fibres

Answer 4

superiorly and medially

Question 5

quadratus lumborum actions

Answer 5

trunk extension, same side lateral flexion

Question 6

quadratus lumborum function

Answer 6

laterally stabilises lumbar spine, flexes 12th rib to resist diaphragm contraction during inspiration

Question 7

quadratus lumborum nerve supply

Answer 7

anterior rami T12-L4